updated 03:30 pm EDT, Tue October 11, 2011
Update required for iTunes Match beta participants
Having just publicly released iTunes 10.5, Apple is already seeding the first beta of iTunes 10.5.1 to developers, reports say. Notes describe the code as making "several performance enhancements and bug fixes," without going into additional detail. The update is required for all developers in the iTunes Match beta; Apple warns that associated iCloud libraries will be deleted once the Beta 1 period is finished.
Known issues in the iTunes Match beta include tracks not being matched and therefore getting uploaded, or alternately songs being mismatched to a different version. Apple further cautions that music can only be pushed to iCloud from one computer at a time.
The rapid arrival of v10.5.1 could mean that Apple has already detected significant glitches in v10.5 and is looking to patch them as soon as possible. The latter is required for using iCloud and iOS 5, which will go live on Wednesday. By extension the software is needed for the iPhone 4S, which comes with iOS 5 pre-installed. The 4S is already shipping, but formally launching on Friday.